/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.activiti.engine.impl.cmd;

import java.util.Map;

import org.activiti.engine.impl.interceptor.CommandContext;
import org.activiti.engine.impl.persistence.entity.ExecutionEntity;

/**
 * @author Tom Baeyens
 */
public class SignalCmd extends NeedsActiveExecutionCmd<Object> {

    private static final long serialVersionUID = 1L;

    protected String signalName;
    protected Object signalData;
    protected final Map<String, Object> processVariables;
    protected Map<String, Object> transientVariables;

    public SignalCmd(String executionId, String signalName, Object signalData, Map<String, Object> processVariables) {
        super(executionId);
        this.signalName = signalName;
        this.signalData = signalData;
        this.processVariables = processVariables;
    }

    public SignalCmd(String executionId, Map<String, Object> processVariables, Map<String, Object> transientVariables) {
        super(executionId);
        this.processVariables = processVariables;
        this.transientVariables = transientVariables;
    }

    @Override
    protected Object execute(CommandContext commandContext, ExecutionEntity execution) {
        if (processVariables != null) {
            execution.setVariables(processVariables);
        }
        if (transientVariables != null) {
            execution.setTransientVariables(transientVariables);
        }
        execution.signal(signalName, signalData);
        return null;
    }

    @Override
    protected String getSuspendedExceptionMessage() {
        return "Cannot signal an execution that is suspended";
    }

}
